function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
     }
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
		document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
	
		homeover = newImage("images/nav/home_on.gif");
		indexover = newImage("images/nav/index_on.gif");
		whatover = newImage("images/nav/what_on.gif");
		resultsover = newImage("images/nav/results_on.gif");
		libraryover = newImage("images/nav/library_on.gif");
		whoover = newImage("images/nav/who_on.gif");
		contactover = newImage("images/nav/contact_on.gif");
		ibarover = newImage("images/nav/ibar_on.gif");
		termsover = newImage("images/nav/terms_on.gif");
		fpindexover = newImage("images/nav/fp_index_on.gif");
		fpwhatover = newImage("images/nav/fp_what_on.gif");
		fpresultsover = newImage("images/nav/fp_results_on.gif");
		fplibraryover = newImage("images/nav/fp_library_on.gif");
		fpwhoover = newImage("images/nav/fp_who_on.gif");
		fpcontactover = newImage("images/nav/contact_on.gif");
		
		preloadFlag = true;
	}
}